How many kinds of train tickets are there in China?

There are four forms of tickets: one is a cardboard card ticket, which is usually sold at the ticket office of a station or a fixed place; The other is a soft paper ticket printed by computer, which has two kinds: temporary substitute ticket and interval ticket. The basic types of tickets are passenger tickets and additional tickets. Tickets include soft seats and hard seats. Additional tickets are divided into urgent tickets, berth tickets and air-conditioned tickets. The additional ticket is a supplementary part of the ticket and cannot be used alone except for children. Passengers can buy soft seat tickets at the train terminal. When passengers take hard-seat cars, suburban cars and boxcars in the bus section, hard-seat tickets will be sold all the way, and when one of them takes a soft seat, he will get the fare difference between soft and hard seats in the soft seat section; Passengers must have soft or hard seat tickets to buy urgent tickets; Passengers must have soft or hard seats when buying berth tickets, and urgent tickets when taking express trains. The arrival and seat of the berth ticket must be the same as the ticket. When changing trains, berth tickets are only sold to passengers who change stations. Passengers who buy berth tickets should explain when they get on the bus at the midway station, and the conductor should indicate on the back of the ticket that they get on the bus at xx station. When taking other trains to the midway station, you should buy tickets from the departure station to the midway station respectively; When passengers take air-conditioned trains, they should buy tickets of corresponding grades or air-conditioned tickets. Passengers can purchase ordinary hard seat tickets for the whole journey when they take air-conditioned cars and ordinary cars respectively, and inquire about the fare difference between air-conditioned cars and ordinary cars for air-conditioned sections respectively. For convenience, several tickets are printed together. This kind of ticket is called joint ticket. Passenger and express tickets printed on one ticket include hard-seat express and soft-seat express. A joint ticket for calling passengers to sleep, in which passenger tickets, urgent tickets and berth tickets are printed on one ticket.